Oklahoma is one of the largest and most tree-like of Cercis varieties, with the potential to reach 4m-6m or more in the longer term, and a similar spread.
In spring it features long-lasting dark lilac-coloured blossom on bare branches.
The large bright green heart-shaped leaves follow, tinged with pink.
In autumn the leaves turn yellow, sometimes with orange or red tints.
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When grown in the UK it is best to plant this Cercis in a sheltered spot in full sun - it likes sunlight and warmth, and will then reward you with the best autumn foliage colours.
The species Cercis canadensis is the state tree of Oklahoma. Some authorities place the south-western Redbuds from Texas, Oklahoma and New Mexico in a separate species Cercis reniformis. The differences are minor, although the Oklahoma variety has a reputation for drought and heat tolerance.
This particular variety, Oklahoma, was discovered in 1964 growing in the Arbuckle Mountains of Oklahoma (between Oklahoma City and the border with Texas).